package com.vci.ubcs.starter.util.node;


import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Maps;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class ForestNodeManagerOid<T extends INodeOid<T>> {
	private final ImmutableMap<String, T> nodeMap;
	private final Map<String, Object> parentIdMap = Maps.newHashMap();

	public ForestNodeManagerOid(List<T> nodes) {
		this.nodeMap = Maps.uniqueIndex(nodes, INodeOid::getOid);
	}

	public INodeOid<T> getTreeNodeAt(String id) {
		return this.nodeMap.containsKey(id) ? (INodeOid)this.nodeMap.get(id) : null;
	}

	public void addParentId(String parentId) {
		this.parentIdMap.put(parentId, "");
	}

	public List<T> getRoot() {
		List<T> roots = new ArrayList();
		this.nodeMap.forEach((key, node) -> {
			if (node.getParentOid() == null || this.parentIdMap.containsKey(node.getOid())) {
				roots.add(node);
			}

		});
		return roots;
	}
}